Projector

a projector and projector technology, applied in indirect heat exchangers, lighting and heating apparatus, instruments, etc., can solve the problems of inability to obtain excellent heat release effect, increase in noise due to the operation of fans, and remarkably high power consumption, so as to achieve efficient supply, promote the and promote the effect of heat release effect of optical elements

Active Publication Date: 2010-03-18
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a projector with a cooling system for efficiently cooling the optical element while reducing noise. The cooling system includes a compressor, radiator, pressure reducing unit, and evaporator, which form a refrigerant circuit. The air subjected to heat exchange between the air and the evaporator is circulated through the optical element to cool it. The invention also includes a partition member made of insulating material, which separates the optical element from the light source and improves cooling efficiency. The cooling system can be easily assembled and maintained. Overall, the invention provides a more efficient and effective cooling solution for projectors.

Problems solved by technology

Therefore, noise due to the operation of the fans increases, and a problem also occurs that power consumption remarkably soars.
There also occurs a problem that a so-called short cycle of the air after the heat release is generated, and any excellent heat release effect cannot be obtained.
The problem of the noise can be solved by such thermoelectric cooling, but such thermoelectric cooling has a poor energy efficiency, and a heat generating section for the thermoelectric cooling is integrally constituted.
Therefore, means for releasing the heat to the outside air (a heat sink or the fans) is required near a cooling target, and a problem has occurred that a spatial restriction is generated to remarkably lower a degree of freedom in design.

Method used

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embodiment 1

[0033]FIG. 1 is a schematic perspective view showing a projector of one embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. The projector of the embodiment is a liquid crystal projector P having a main body 1 provided with a light source 2, a homogeneous illumination optical system 3, a color splitting optical system (not shown), an optical element 4, a projection lens 9 and a cooling apparatus 10 for the optical element 4. The main body 1 is a flat housing made of a material excellent in heat release properties, for example, magnesium. It is to be noted that in FIGS. 1 and 2, for the description of each device provided in the main body 1, the main body 1 is shown by a flat section of a cut upper part.

[0034]The light source 2 includes a lamp 20 such as an extra high pressure mercury lamp, and a reflector 21 for emitting forwards light (diverging light) diverging from the lamp (FIG. 2). The light source 2 of the embodiment has a constitution in which the reflect...

embodiment 2

[0063]Next, another embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG. 4 shows a perspective view of the outline of a liquid crystal projector of the present embodiment, FIG. 5 shows a plan view of FIG. 4, and FIG. 6 shows a sectional view cut along the A-A line of FIG. 5, respectively. It is to be noted that in FIGS. 4 to 6, parts denoted with the same reference numerals as those of FIGS. 1 to 3 produce the same or similar effect or function, and the description thereof is omitted here.

[0064]In a liquid crystal projector P of the present embodiment, unlike the liquid crystal projector P of Embodiment 1 described above, the inside of a main body 1 is not partitioned by a partition member 30. In this case, a duct 50 is provided around liquid crystal panels 5, 6 and 7, polarization plates 8A, 8B and a prism 25, and cold air subjected to heat exchange between the air and an evaporator 18 is supplied to the liquid crystal panels 5, 6 and 7, the po...

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Abstract

There is disclosed a projector capable of efficiently cooling an optical element while decreasing the generation of noise as much as possible. A projector P includes a main body 1 provided with a light source 2, an optical element 4 (liquid crystal panels 5, 6 and 7, polarization plates 8A, 8B and a prism 25) which processes (modulates) light emitted from this light source 2 in accordance with image information and a projection lens 9 which projects a modulated projection optical image onto a screen, and further includes a cooling apparatus 10 in which a compressor 12, a radiator 14, a capillary tube 16 (a pressure reducing unit) and an evaporator 18 provided in the main body 1 constitute a refrigerant circuit, and air subjected to heat exchange between the air and the evaporator 18 is supplied to the liquid crystal panels 5, 6 and 7 to cool the panels.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a projector which processes light emitted from a light source by an optical element to project a processed projection optical image onto a screen by a projection lens.[0002]Heretofore, this type of projector, for example, a liquid crystal projector has a constitution in which a light source, a liquid crystal panel (an optical element), a projection lens and the like are mounted in a main body. The liquid crystal panel is constituted of three liquid crystal panels for processing (modulating) color rays in accordance with image information generally as light bulbs. Moreover, light emitted from the light source is split into the color rays, processed (modulated) by the liquid crystal panels in accordance with the image information and synthesized as a projection optical image through a prism and the like. Then, the synthesized projection optical image is enlarged and projected onto a screen by the projection lens.[0003]I...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G03B21/16
CPCG02F1/133385G03B21/16H04N9/3197H04N9/3144H04N9/3164H04N9/3105
InventorTSUCHIYA, MASAKIUCHIYAMA, NAOYUKI
OwnerSANYO ELECTRIC CO LTD